title: Relationship between male moths of Cryptoblabes gnidiella (Millière) (Lepidoptera: Pyralidae) caught in sex pheromone traps and cumulative degree-days in vineyards in southern Uruguay.
abstract: Cryptoblabes gnidiella (Millière) (Lepidoptera: Pyralidae) has been known in Uruguay for 30 years and only in vineyards, despite being polyphagous. In recent years, this pest has caused sporadic but serious damage on some grapevine cultivars. Understanding the insect's phenology and developing a monitoring program are essential aspects of integrated pest management. We monitored males using sexual pheromone traps on four cultivars of vine, Pinot noir, Tannat, Gewürztraminer, and Cabernet Sauvignon, in two vine-growing establishments in the Department of Canelones and compiled data on the accumulated effective temperatures for the southern area of Uruguay. We determined that this species undergoes three generations per year and overwinters without diapause as larvae on dried grapes remaining after harvest. Using the proportion of cumulative male moths caught from December to May from 2003-2007 on the four cultivars and the sum of effective temperatures above two previously-published lower-threshold temperatures for development, 12.26°C and 13°C, statistically significant logistic models were estimated. Predictions based on the resulting models suggested that they would be acceptable tools to improve the efficiency of integrated management of this pest in Uruguay.
authors.affiliation: Department of Plant Protection, Faculty of Agronomy, University of the Republic, Ave. E. Garzón 780, Montevideo, 12900 Uruguay.
authors.forename: María Valeria
authors.initials: MV
authors.lastname: Vidart
authors.forename: María Valentina
authors.initials: MV
authors.lastname: Mujica
authors.forename: María Victoria
authors.initials: MV
authors.lastname: Calvo
authors.forename: Felicia
authors.initials: F
authors.lastname: Duarte
authors.forename: Carlos María
authors.initials: CM
authors.lastname: Bentancourt
authors.forename: Jorge
authors.initials: J
authors.lastname: Franco
authors.forename: Iris Beatriz
authors.initials: IB
authors.lastname: Scatoni
keywords: Degree-day models; Flight activity; Hibernation; Honeydew moth